Australia's oldest jockey Danny Miller's career is over after Western Australian officials ruled he is no longer able to ride.

Miller, 70, began his career in 1962, meaning he has spent the last 56 years in the saddle.

WA racing journalist Jay Rooney, from the West Australian, reported that Racing and Wagering Western Australia (RWWA) have stated that Miller is unable to ride following medical advice.

He had bookings at Saturday's Carnarvon meeting but will no longer fulfil those engagements. 

Miller won Perth's Group One Railway Stakes aboard champion galloper Northerly in 2000 and had a ride in the 1967 Melbourne Cup.

He had his final ride at Pinjarra on Thursday.